Adding-machine.



ADDING MACHINE. APPLICATION FILED JUNE 18. |915.

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ADDING MACHINE.

APPLICATION FILED JUNE la. |915.

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ADDING MACHINE. APPLICATION FILED'IUNE I8. 1915.

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ADDING MACHINE.

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ADDING MACHINE. APPLICATION FILEDJUNEI8,1915.

Patented N ov. 19, 1918.v

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ADDING MACHiNE.

APPLICATION FILED me45 in. 1915.

Patented Nov. 19, 1918.

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JOHN I. HARRISON, JR., OF HAMILTON, OHIO, ASSIGNOR TO THE HARRISONBALANCING y MACHINE COMPANY, OF HAMILTON, OHIO, A CORPORATION OF OHIO.

ADDING-MACHINE.

Specification of Letters Patent.

Patented Nov. 19, 1918,.

Application filed June 18. 1915. Serial No. 34,827.

Tov all whom. 'it may concern:

Be it known that I, JoHN P. l-Luiuisox, Jr., a citizen of the UnitedStates, and a resident' of the city of Hamilton, in the county of.Butler and State of Ohio. have invented certain ne and usefulImprovements' in A lding-.\Iacl1ines, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings'` forming part of this specification.

l My invention relates to adding machines wherein a series of numbersare printed on a strip of paper, and a system of counters gives a totalof all numbers printed. It is the object of my invention to provide aslnall and inexpensive adding machine that ,is simple to operate and yetaccomplishes all i of the results of the larger and exceedinglycomplicated structures now on the market.

The mechanical plan of my invention is to provide a movable carriage onwhich the system of counters and a printing platen are mounted. Astationary gear -mounted so as to mesh with the counter system isactuated from a keyboard having one key for each digit. A series of keysare also provided one -for each position of the carriage, a tens key, ahundreds key, and so on. These keys move the carriage the desired numberof spaces beyond the position of the stationary gear, and bring thedesired' counter pinion into mesh With this gear. To register onedollar, the carriage is moved so that the hundreds pinion4 is in meshwith the gear, and the key marked l is depressed, the carriage will thenmove one space over and two cipher keys are depressed, thus moving the'carriage to nonregistering position. The printer is likewise a singlereciprocating bar, operated from the keyboard, and it prints the numberadded on the counters on the paper strip moued along by the carriage.The stationary gear is operated from a ratchet device that is actuatedby a balanced lever, having a pawl device at each end, which is pushedupwardly when the number keys are depressed,.at its central point. Asliding member is provided, having hooks to engage one end or the otherof this lever, thereby causing the other end of the lever to be raisedwhen a key is depressed. and causing the pawl atsaid latter end of thelever to actuate the stationary gear shaft.

This structure enables the operator to add or subtract. because one ot'the pawls is on one side and one on the other ofthe stationary gearoperating device, and the stationary gear may be rotated forwardly orbackwardly as desired. A transfer mechanism for the counters is providedwhich does the carrying of tens over from one counter to the other, inaddition, and this mechanism is also adapted to be reversed when it isdesired to subtract instead of add by a method of shifting the fulcrumof a forked operating member, that does this carrying over. A key markedSubtract is provided to accomplish these shifting operations` and whenit is depressed mechanism is provided for changing the printing ribbonfrom black to red.

In working the device, therefore, it is intended to have the operatoradd on the counters and print the desired colmnn of numbers and thendepress the subtraction key and print in red and subtract the totalshown on the counters. This clears the counters and brings them to zerofor another operation, and Oives a printed total on the paper strip. Clance of error is discounted because if the correct total is notsubtracted the counters will not show at zero position.

It is thus the object of my invention to provide simple and accuratemeans for accomplishingthe movements and operations now brieflymentioned, and it is also my obje-ct to provide devices for rotating theprinting platen, andactuating the ribbon spools, and various otherstructures necessary in the printing operation, in a simple,

automatic manner, which will be developed in the ensuing description.4

The various objects are accomplished by that certain construction andAarrangement of parts to be hereinafter more specifically pointed outand claimed.

In the drawings,

Figure l is a top plan View of the machine with the ribbon feed removed.and the carriage at the end of its movement.

Fig. 2 is a right side elevation of the machine with the side plateren'loved so as to show the carriage and the various` operating yokesand levers.

Fig. 3 is a vertical longitudinal section taken inside of the left wallof the machine,

showing in elevation the parts mounted on this wall and the subtractkey.

Fig. is a central longitudinal section of the" machine. y

Fig. '5 is a rear elevation of the machine. l Fig. :"3 is a plan view ofthe machine .with the carriage and shifting keys removed.

Fig. l is a detail perspective view showing the subtract mechanism andthe ribbon shifting device.

Fig. 8 is a detail perspective view of the locking means for thecarrying pawls.

Fig. 9 is a like view ofthe printingr arm and its operative connections.Fig. 10 is a detail elevation of the carrying device when in addingposition.

F ig. 11 is a like view with the parts in subtracting posit-ion.

Fig. 12 is a rear elevation of the counter system.

F ig. 13 is a ,top plan view of the ribbon feeding device.v

Figi. 14 is a bottom plan view of the same.

Fig.-1'5 is a central vertical section there-y some kind of top covermay be readilyv placed on the machine as will be understood'.

without complicating the drawings to show the same.

The carriage is formed with a. framework comprising two side plates 4and 5 (left and right respectively). At the rear end a shaft G (Fig. 2)`extends across the main framework and the two side plates of thecarriage have each a collar 7 set into them which rides on this shaft. Abar 8 extends across the main frame for a front support of the carriageand a roller 9 Amounted on the cross bar 10 of the carriage travels on'this bar 8. To steady the carriage at the front a small hook l1 may bemounted on the cross bar 10 of the carriage to engage underneath the bar8.

Mounted across between the two side plates of the carriage at the lowerrear corner are two downwardly facingracks 12 and 13 (Figs. 4 and 5).The teeth 14 on the This pawl has a fork 21 which slides on a pin (Fig.5), and is actuated by a spring 23. 1t has a wide slot on its under sideengaging over a pin Q4. The normal position of the plate and pawl on therock shaft is with the tooth 18 out of engagement with the rearward rackand the pawl tooth in engagement with it. The shaft 16 when it isrocked, pushes the tooth on the 'pawl to a position in between the tworacks, when the' 75 spring will at once pull the pawl to the Vrightcausing the tooth to engage, as the ment with the racks, then thecarriage will be permitted to move over one notch of the racks becausethe pawl tooth which engages the rearward rack in normal position hasadvanced onestep. A spring secured to the carriage at the rear and tothe main frame of the machine serves to vpull over the carriage as soonas it is permitted to move by the devices now described rlhe tooth onthe pawl being faced as described, I

will allow the rear rack member to slide over the pawl as it pivotsslightlylon its -mounting on the two pins 22 and 24 heretoforedescribed.

Fixedly mounted at the right 'side' of the rock shaft 16 isa lever 26fonactuating the y shaft, said lever being connected at one end v toarod 27 (Fig. 2) and at the other connected to a spring 28, which isconnected to.

a pin on the framework. The rod27 actuated, as will be described, pullsthe rock shaft over, and the spring 28 pulls it back to normal position,thereby accomplishing a step by step movement of the carriage each timethe rod 27 is pulled from the front end of the machine. 4

On the rear members 29 of the carriage frame'is journaled the platen 30of the printing device, having a friction Aroll 31,presSed against itslower surface by a spring 32 (Fig. l), and a hand wheel 33 for turningit by hand when desired. Means Willbe described whereby the printingplaten is turned, thereby feeding the web of paper 29a between theplaten and the roll; this paper being mounted in a roll on armsextending rearwardly from the frame.

The shaft 3l of the platen has mounted at its left hand end outside ofthe carriage the pinion (Fig. 3), by which pinion the platen is adaptedto be turned each time the l' carriage is shifted'for a newregistration. A lever 36 (Fig. `3) havinga hook l37 at its rearward endadapted to engage the teeth of assieme the pinion 35, extends along theleft side of the machine. Pivoted one screw 38 (Fig. 5)

is a small frame 39,-wl1ich has an upwardly extending -ilange 40 thatforms a channel forl guiding the end of the lever 36, The screw platen.'i Mounted nvthisirame 39 and eX- tending out over tie ,top of the lever36 is` a pin 41 (Fig. 3).v 'The lever has a cam edge 42 at-the pointwhere it lies beneath this pin, and aspring 43 connected to the leverat. 44 and connected to the carriage frame 39 t 45 vserves to maintainthe lever 36 at its cam edge 42 in contact with the pin 4l. At the lowerend of thesmall frame 39 is located a spring pin 46 which engages aseries of apertures 47 1n the carriage side piece `29. Bv

shifting the position el the small frame on its mounting 38 and engagingthe spring pin 46 inthedesired aperture 47, the posiltion of the pin 41with regard to the cam edge 42 may be regulated, andthe cam edge is ofsuch a shape that in the first position' of thesmall frame 39 thetoothedend of the lever 36 will be allowed to move the platen actuating piniononly the one step, the second position of the frame 39 will allow amovement of two steps or teeth and the third position three steps. Thusthe operator by shifting the lower end ofthe small frame 39 can regulatethe spacing of the printing devices; In the description of the 'keyoperated devices for shifting the carriage, it will be developed how thelever 36 is pulled forwardly every time the carriage-is shifted.

The counters (md the carrying-mechanism.

Journaled lon aiXed 'shaft 48 (Figs. 4, 10, -11 and 12), is a series ofcounter pinio'ns 49 ef the-number desired dependent upon the lsi theteeth 50 apart', these latter teeth 5l betwenty teeth 53 to mesh withthe teeth ofthe pinions 49.

The pinions .49 are Vadapted to be operated by a master .Wheel 55 (Fig.4), and as the master wheel is stationary, as will be de'scribedhereafter, the spaces between the' teeth 50 of the set of pinions 49mu'st'be always in absolute alinement because they must be in mesh withthe master wheel and because when the carriageisvmoved the master wheelmust pass by each one of the pnions. In order t0 maintain the pinions 1nproper'ahnement, a series of bell crank lever `pawls 56, one for eachpimon, are

:mounted on a' fixed sha-ft 57 across the c-ar- .riage and are held bymeans of'springs 58 l--so as to force rthe small friction rollers attheir other end into the intertoothed spaces Journaled on a'xed shaft 60across the carriage and beneath the/pinion shaft 48 are a series of bellcrank levers 61 having double cam ends which are so pivoted as to liewith one end between each pinion, in the path of the laterallyprojecting carrying teeth 51. These bell cranks 61 are held in thisposition by the springs 62'a and have notches 63 which engage the hookedvends 64 of another set of bell cranks 65 mounted at 66 in Vfront of thebell cranks 6l. lVhen in the hooked endl 64`of the second setv of.

bell cranks will be released, allowing their upper ends to be'pulled bythe springs' 67, which movement accomplishes as will be described amovement of one ynotch of the adjacent counter pinion, thereby carryingfrom one pinion to 'another'.

Pivotally securedialong the side of each bell -crank 65 is a forkedsliding member 6,8, (Figs. 4, land 11), having lingers 69, 70 positionedso that, when the" bifurcate member is shifted, the position of thisbifurcated member will determine Iwhich of the t\. o lingers willcontact with its .counter pinion 49. The slidiug members or forks are 2provided with slots 7]. adapted to engage in the groove 72 of a groovedbar 73. lVhen the part-'s are in normal position, the grooved bar willbe in line with the pivotal point of the forks 68, and the shaft 48 ofthe counter pinions, and if the forks were caused to slide, in theabsence of further adjustments,

both teeth would contact with the counterpinion, resulting in nomovement of it,

Means are provided for shifting the position of this grooved bar, sothat itmay' be rocked to a position below the line above mentioned oraboveV it, whichwill result in `the first instance in bringing the upperfinger 69 into contact with the pinion above its center and will addone, .on the said counter pinion, and in the second instance- 1nbringing the lower linger intoycontactV and subtracting'one fromthe`said p1ni0n.`

The bar 73 is mounted on arms 74, 74', which are tixediy mounted on arock shaft `75 (Fig. 8), that is journals@` in the sides rae ofthecarriage. The rock shaft 75 has bell crank on its left hand end whichhas a forked member 76 and a member 77 to be engaged by a locking pawl..The forked end is in engagement with a cross rod 78, that is rigidlysecured to the transverse rock shaft 80 by an arm 79. The transverseshaft which is operated as will be described is located at the forwardupper end of the machine, and when it is rocked, the forked end of thebell crank will be swung to one side or the other, thereby causing theshifting of the bar 73 which guides the pinion operating forks as willbe obvious without following out each interconnecting member.

The carriage carries on its left side a stud 81 (Fig. 8) in a slot ofwhich is pivoted a latch member 82, having a finger 83 which is held bya spring 8st in the path of the movement of the end 77 of the rockingbell crank last mentioned. lWhen the carriage is at the extreme leftwhich will be when it has reached the end of its movement after aregistration, the other end 85 of this latch menber will come intocontact with thel mounting screw at 119 to be hereinafter mentioned Fig:This will swing the finger 83 of the latch out of the path of the bellcrank end 77, and the bell crank is free to move. .As soon as the propermovement of the bell crank has been accomplished which will determinewhether the carrying mechaf nism is to add or subtract, the carriage isthen to be moved as will be described, which will release the latch andenable it to swing across the end of the bell crank, thereby lockingitin the desired position until the carriage hasmoved entirely backtothe left again. A spring 75a connected to the arm 75h on the shaft 75,returns said shaft to normal position.

Fixedly mounted at the ends of therock shaftGO (Fig. 4) is a bail-86which is adapted to beswung by means of a member tov be described later,said bail having an upwardly extending arm 87u p`ivotally connected to abent link 87 that extends forwardly where it is pivotally connected withan arm 88. The arm 88 is-connected with a short bail 89 that is mounted`on the shaft 66 of 91 with the long arm 3G, which it will be remembered,operated the printing platen, causing it to rotate. vThe movement of thesmall bail will pull Iorwardly this arm 30 and thereby cause the linger37 at its rear end to actuate the pinion 35.

l The parts will be hereinafter described which cause the carriage tomove. and itis these partswhich accomplish the movement described in thelast two paragraphs, and 'it is thus to be appreciated that at the timeof moving the carriage, the carrying mechanism will be returned tointermeshing position, with the fingers 69, 70.011 the fork tid, in aposition to either add or subtract, am., thatI the printing platen willbe caused to rotate, thereby bringing fresh paper forward to receive anew impression of another numerical item to be printed and registered.

The musici' wheel @prrr/ting mechanism.

Mounted instaggered relation at the forward end of the machine are aseries of key levers 100, which are'pivoted on a common shaft 101 andturned upwardly at the front of the machine where they are provided withkeys 102 Vwhich are numbered from left to righ-t andin staggeredrelation fromizero to nine (Fig. 1). A slotted plate 103 and having tenlslots in it, is set over the key levers and serves as a guide for them.Each key lever has a spring 101 connected to it, which springs areconnected to a common cross bar 105 and serve to retain the keys in a anarm 109. This bail is maintained with its forward end up by the springslikewise connected to the cross member 105 which holds the springs ofthe key levers. The downward movement of eachI key is limited as will bedescribed. The length of the -tongue 106i on the key lever willdetermine the distance which the bail 108 is rocked and accordingly thedistance. upwardly which the rear end of the arm 109 will be moved.

The arm 100 is pivotally connected at 111 with the central portion of apawl carrying bar 11i/2. At each end of this pawl carrying bar is an arm1.13 which extends upwardly (Fig. 3) where it is pivotally connected toan arni 113a that is pivoted on the shaft 114 of the master wheel.Mounted on the end of each arm 118 is a pawl 115 which is normallypulledby a spring 116 into contact with a pinion 11T that is ixedlyniounted onthe shaft 111 of the master wheel.

One of the arms 113 extends up on one side 0f the pinion 117 and theother on the other rests between `the teet side of this pinion, and whenthe pawl carr ing bar 112`is in inactive position, both of t e springpawls 115 will lie behind a segmental guard late 118 which is mounted at119 to the side frame piece.

Pivotally mounted on the side of the case lean arm 44h .carryin a roller14i which of the pinion 117, the arm being .kept in tension by thespring 4 44c attached to the heel of the arm 44". The `vpurpose -of thisdevice isvto maintain the alinement of the master Wheelon the shaft 114with the counter pinions 49 during' the operatign of the machine and toprevent the pawls. 115 in their return movement from disturbin theposition ofthe pinions.

It can leseen thatif one end of the pawl carryin bar should be retainedand the .other al owed toswing and the bar 109 act-uated to pushupwardly on the paivl carrying bar, then the free end of the pawlcarrying bar will rise and its pawl will be brought into Contact withthe pinion 117, thereby causing the shaft 114 and the master wheelfixedly mounted thereon to rotate. Mechanism which is provided for thispurpose ivill be described under the head of subtraction mechanism.

- The printing mechanism. The valuekeys'also operate :ri printingmechanism which operates against the printing platen valready describedeach time a value key is depressed. Av vertical printing bar 119 isprovided, having a vertical set of type 120 for the numerals 0, 1,2, 3,4', 5.16,

. ,7, 8, 9, 4with the 0 at -the top and the 9 at the bottom (Figs. 3 and9). 4 This bar has a long slot-121 by means ofvvhich` the bar slides .onthe pin 122 secured at the upper en d of a swinging arm 123.

The arm 123 vis mounted on a rock shaft 124, which shaft has asmall arm125 at its right hand end Whichis under pressure of a spring 12.6'. Atthe left hand end of the shaft 124 is ,an arm 130 which is fixed on theshaft and has a laterally extending pin 127 A lQng bar 128 which ispivotally connected, at its' forward end with an arm 129 whicharm isfixed upon a rock shaft 141, the actuation o f Whichi'will behereinafter detailed, is employed to pull over and then release the pin127 on the arm 130 above -mentioned. This will cause the type bar,

whose adjustment Will be described. to be first drawn forwardly and thenreleased when the spring 12,6 will cause it to strike elo the printingplaten.

.To accomplish the pulling over and releasing of the pin 127, the bar128 is notched at 131, to engage the pin. At the end of the baiiisformedma cam edge 132 which slides over a fixedJr ein 133 on the leftwall of the machine.' As the bar is drawn back by the rocking of theshaft 141 the cam 'will ride (Figs. 6 and 9). The shaft 135 is caused torock by means of a con'ipound lever having members 136, 137 and 138respectively. The lever member 138 is fixedly secured on the shaft101which it will be reinen'ibered is the shaft which operates thecounter turning devices and whereon the levers for the value keys arelooselysinounted. Each time a value key is depressed, the rock sha-ft101 is moved a distance dependent upon the length of the graduatedtongue 106 of the value key lever. The parts of the printer are soproportioned that when the key 9 is depressed on the keyboard the typebar at the rear of the machine will be raised on its` slidable mountingsufficient distance to bring the type 9 opposite the printing point onthe "platen 30, and the cam and pin that release-the a1m123, are soarranged that this will `iotlie doneiuntil the value key has beendepressed so asto move the bail 139 down as far as it lwill go.

The. means l'for operating the carriage release, "which comprisesdevicesA forpulling over the rod 27as mentioned .above when describingthe dependin double vracks at the rear of the carriage, yand4which',,results in a step by step movement of the carriage,y willnowbedescribed. At the` front of thef machine is mounted a. bail 139 having atransverse. .member 140, said bail being mounted on'l ashaft 141 (Figs.2 and :4). Each value key has a hook-142 which forms an Lshapedv slotatthe under side of said levers. When a lever is depressed, thetransl'verse member of the vbail 139 will ride into the slot and when the lever.rises up again by means ofits spring', the bail will be released.Howevenwhen the bail is partially depressed, the key lever is tightlyheld so that it must. follow they full stroke of thet bail pull to therod 27, thereby throwing over the' 1 25 carriage releasing pawls, whichas soon as the key is released will allow the carriage to move one step.The spring 28 Workin-gy counter to the rod 27 as was described ahcve,Ywill accomplish this bv pulling over the pawl shaft as soon as the bailland its shaft are allowed to return to position such that the .jrod`i27will not be positively engaged.

.fThe' means to enforce a full stroke of the bail139 by employing a fullstroke pawl. will now be described.'v At the right hand side of the bailis mounted av segmental rack145 (Fig. 2) and mounted on asuitably placedpin in the right hand framework, is a double pawl 146. Two notches 147at the forward end` of, this pawl are engaged by the roller len d'of abell crank 148. The bell crank is 'the rack so as vto be engaged by thepins 151, 151, located on'tlie rack which, at each vend .spring-pressedagainst the pawl and its end will lie in either one of the two notches.The pawl is so positioned that one or other of its teeth 149 'willengage the rack 145 aforementioned; When the rack is moving downwardlyand lthe lower pawl tooth is in en `gageinent -With the rack, then noupward movement of the rack is possible, and when the rack is movingupwardly with the upper tooth in engagement there will be no downwardmovement possible. The pawl is shiftedso that the proper teethv are pre`sented'to enforceA full upward or downward movement, 'by means of an arm150 on the pawl which lies along the left hand side of ofthe rackmovement, will throw the pawl so" that the proper 'tooth 'is inengagement.

The' rz'bbm guide.

15155 arranged so as to clear the carriage in *its movement.. Ontheloweil end of the 'guide is an expanded end having a short slot 156anda long slot 157 (F igs. 2, 4 and 7), these two slots being incommunication Awith each other at their-lower ends. Extending from therock shaft 141 is .a'curved arm 158 which has a pin 159 on its rearwardend to lie in the slotted formation 156, 157.

)Vlien the rock sha-ft is actuated, the arm v 158 Will raise the guide adistance dependenton the slot lwith which the engaging. pin is in line,and the ribbon will-be raised to 'be en gaged by the type on the typebar, either a short distance -to cause a printing of one color or a longdistance to cause a printing of the other, on the two color ribbon.

Projecting forwardly from the guide bar 153gis a shoulder 153il which,as the guide raised' when-printing black, at the limit of the throwcontacts with the rock shaft 124 serving as a"stop to prevent.overthrow.

The expanded lower end of the guide is providedwith means for shiftingit forward or rearward to effect the desired. alineieee-,14e

ment. of the actuating pin 159, or. said link,

which means is connected to the subtract- The master 'Lv/feel stop.

A means is provided for ypositively stopping the master wheel fromoverthrowing or making an `excessive registration ou the counters (Fig.lvlounted on the shaft 141 of the value key bail 139 is an arm 160having a finger 161, said arm being so positioned that its linger willbe swung into mesh with the master wheel as soon as the bail 139 hasbeen depressed to the full extent of its movement.

The movements 0f the machine which are dependent on the value keys fortheir initial movement have now been described, and it is desired in thenext place to describe the order keys by which the carriage ispositively moved with relation to the master wheel.

The order lieg/8 for setti/ng' the carriage.

Loosely mounted on a shaft 162 located near the middle of the machine,are\a series of key levers 163 of sizes so as to present their forwardends in staggered relation (Figs. 1 and 2). At the front they extendupwardly and have mounted at their u-pper ends the order keys 164properly marked for the spaces that the carriage is to be moved.

- In the example shown .in the drawings, there are nine `of these leversand keys, one for each counter, 4and these levers are returned to normalposit-ion after operation by the springs 163% The' levers are providedwith-graduated depending tongues 165, as in the case of the value keys,and' these tongues contact with the transverse' member l166 of a baill167'. The bail is mounted iXedly on the shaft 162, where the key leversare loosely mounted,

-and when the bail is depressed this shaft is `long end 172 is sopositioned that it will contact with a post 173 depending from the righthand end of the carriage. )Vlien the shaft is rocked, the bell crankwill bepulled, the arm' 172 thereof swept across the ma- `chine and thecarriage moved over a distance dependent upon the amount that the shaftis rocked, or in other words upon the key that has been depressed.

Mounted on another rock shaft 174 is another bail 175, having atransverse member ioo devices for line spacing the movement of the nprinting platen.

The shaft 171 extends across the machine as do all the bail shafts andmounted on the shaft 171 atthe left hand side of the niachine (Figs. 3and 4), is a lever 179. This lever (Fig. 5) has mounted on it anupwardly extending link 18() which is pivoted at18i)l to a stop pawl181. This pawl has a tooth 183 adapted to engage he teeth 15 of thedownwardly depending rack 1?). rThe pawl is so positioned that at thebottom of the stioke of the order keys it will come into mesh with thesaid rack, thereby preventing overthrow' of the Carriage. and preventingan against release, and when the overthrow preventing pawl 181 lastmentioned will stop any excess mo'ven'ient in the opposite direction.The pawl 19, it will be remembered, is spring-mountedso that the teeth11 of the rearward rack can pass it in a reverse direction.

lt will be reiiien'ibered that in shifting the carrying devices from addto subtract posi tion, mechanism was described whereby the '.arrierforks were moved to one side or the other of a center, and mechanism forlocking these shifting means. It will be recalled that these deviceswere operated by the rock ing of a shaft 8O at the forward end of themachine, upon which was mounted a depending arm 7 9. On this shaft 80 ismounted a T-shaped piece of which the depending arm 7 9 is a member andwhich has the extending arms 181, 185 (Figs. 3, 1 and 7). These two armshave laterally extending pins186 on them and a forked niember 187,having hooks 188 at each end ot' the fork is provided to pull down onearm or the other.

The forked member is pivotally mounted `on the bail 175 of the orderkeys. and when the bail is depressed, the fork is pulled down engagingone end or the other of the T-piece above mentioned, thereby rocking thedepending member 79, and shifting the carrying Ameehanisn The subtractkey and its interconneeted parts serve to shift the fork to one side orthe other so that it will, when pulled down by the order key bail, hookover the desired side of the T-membcr- This mechanism will be describedunder the head of the subtract key. and it will be' understood that thesubtract mechanism is to be returned after one operation of the carriageto normal position. and that this normal position will be such that thefork 187 will. unless moved by the subtract keys. be in a position sothat the end 18-1 of the T will be pulled down,

thereby throwing the carrying devices toadding position.

Tim .wu/)tract ./rcj/ um] )Hf/tss Iivotally mounted at 20() to the leftside of the machine. is the subtract lever 201 which has a key 202,marked Sub." (Figs.

1. 3 and 7). r1`he lever 201 is in nature a bell crank, and has at theend 203 thereof a laterally extending pin 201. which engages a slidingbar 205 that extends from front to rear along the left hand side of themachine.

hilounted on the right hand face of the lever poitioirQUSl is a Istud20G. having a suitable head, and adapted to-slide in a slot 207 in thefork 187 that was described last above. iVheii the subtract key isdepressed, the stud 206 will move the fork member a short distancerearwardly, and this; will be sutlicient to shift its rearward fork intoposition to pull down on the side 185 of the T-piece. above described(Fig. 7). Thispull as will be remembered, is to be accomplished by theorder key bail 175, and the fork is permitted `to .slide becauseof theslot 207 which permits the subtract lever to shift the position of thefork without disturbing its motion otherwise. in normal position it willleave the parts so that the end 184 of the T can lie-depressed (Fig. 3)lto add position.

Under the description of the pawl 'carrying bar 119J which supported thepawls which operated the master wheel, thereby working the counters, itwas mentioned that means were to be provided for holding pivotallyoneend oit` the bar or the other which would determine which of the pawls115 thereon (Fig. 3) would contact with the master wheel operatingpinion. It will be remembered that one pawl was on each Vside of thispinion and accordingly that to hold the rearward end of the pawlcariving bar would cause the master wheel lo .subtract on `the counters.and to hold the forward end wonbd cause it to add.

The pawl cariving bar for the above purpose is provided with pins 208,and the sliding bar 205 is provided with a T-shaped plate Q09. locatedadjacent to these pins so that when the bar is caused to sliderearwardly it will hook over the rearward pin,

lVhen the subtract ke)7 isv causing the rmaster wheel to subtract. Thebar is mounted by means of slotsand studs 210 and the pin 204 on thesubtract lever-7 will push or slide the bar rearwardly wh "i thesubtract key is depressed.

the rear end ofthe bar it is arranged to contact with a lever 211 whichis pulled forwardly by a spring 212. This lever will therefore serve topush the sliding bar into the guide loo 'swinging of the pin will causethe end of 4the ribbon guide to shift so that it will have yits shortslot ,156 in engagement with the guide raising device, instead of thelong slot, thereby resulting in a printing of a different lcolor whenthe subtraction Akey is depressed. The spring 212 on the lever `211 willserve to return the ribbon guide as well as the sliding bar 205 tonormal add position. y

A. lock is provided for the sliding bar 205, which comprises avertically pivotedlateh 217, mounted in a slotted studl 218 located.

- on the left side wall.of themachine. The

finger 219 of this latch is spring-pressed by "the spring 220 so as tolie in the path of the.

Sliding bar, which bar has'a tongue 221, on either side of which thefinger 219 may engage. If the finger lengages the forward end of thetongue'the sliding bar will be held against spring-pressure at 212, insubtract position (Fig. 7 When the carriage is at its extreme left handposition, which will be after the end of a registration, it will contactwith the extension 222 at the upper end of the latch, and release thesliding bar whenitwill at once return to ladd position.

When the subtract key is depressed, the order. key must then bedepressed, so that the carriage when it releases the latch will enablethe latch to engage with the forward end of the tongue 221.

kvThe ribbon feed.

" and released by each depression of a value key. Mounted on a plate 223across the top of the machine are the spindles 224, 225,

for printing ribbon spools. These spindles have on the under side of theplate pinions 227 227. The pinions 227 are in mesh with pinions 5228,which are mounted otn the under side of the plate so as to revolve inunison withthe pinions 229, 229.

engages over the pin and the A slot 230 is formed at the middle of theplate, having the forward end broader than the rear. V Pivoted at therear end of this slot is a slotted plate 231, having 'at its forward endtwo teeth 232. A small lever 233, pivotally mounted on the top of theplate to one side, has a roller 234 adapted to mesh with one or theother of the two teeth above mentioned. The roller .is pulled by thespring 235 into frictional contact with eithertooth, so that to causethe plate 231 to swingfrom one tooth to the other will @ill for a slightstrain.

Extending forwardly from the arm that is employed to operate the typebar is an arm 230, said arm 236 havingl slotted connection 237 with thetypebar arm so that it.

will be pushed forwardly by said arm only when the type bar 'has beendrawn back ready to strike. neath the plate223 on which the ribbon feedis mounted, and has a. stud 233 on its upper side to slide in the slot239 in the pivoted plate 231 heretofore referred to. under face of thearm at this point is a double pawl 240, held in a longitudinal lpositionwith regard to the plate by a spring 241.

'The' slotted plate 231 has an arm242 extending l around the forward endof the mounting plate 223 where it is connected .by a spring 243 with apivoted double ratchet pawl 244. When the plate 231 is moved into lefto-r right hand position under the engagement' of its spring-pressedfrictional roller, this willdraw the ratchet pawl to the same direction,Ithereby preventing back movement of the pinions which are underoperation of the double pawl 240 as will be described. Q

The varm 236 when caused to operate by the type bar devices asdescribed, will move the pawl 240 so that one or other of its teeth,dependentv on the position of fthe slotted plate 231, will work againsta pinion lVhen one of the pinions 229 is prevented from operating byreason of the complete uuwinding of the ribbon on the`opposite spool,and the double pawl 240 cannot for this reason complete its forwardmovement, then the pressure on the plate 231 will cause it to swing overin spite of the friction The arm 236 passes be On the roller 234, so asto bring the otherv tooth i at the end of the plate 231 into mesh withsaid roller 234. This will accomplish a shifting of the ribbon feed sothat it will be wound from the rst spool onto the second or vice versa,and as can'be seen this is a purely automatic reverse.

Conclusion.

The various features of my adding machine have now been described indetail, with running comment as to its relation to the other parts ofthe machine. In view of the fact that the parts are numerous,` it is notbelieved to be necessary to supplement the detail matter with anygeneral statement of the opeiation of the various parts, as the generalscheme was outlined in the introductory matter. The parts, althoughnumerous, are relatively few compared to f most adding machines now onthe market.

The devices for positively shifting the carriage relieve the operatorfrom the necessity of manually moving the carriage, to starting positionas is usually necessary in adding broadly claimed in the ensuing claims,it betypewriters. The fixed, but reversible master wheel is believed tobe new with applicant as are various other features which are 'ingdesired to include in such claims the full `range of equivalents',notwithstanding that .equivalent structures have not been pointed vforoperating the counter operating mechanism, a pawl carrier having pawlsto engage both sides of said pinion, interconnecti ing mechanism betweenthe value keys and the central portion of the'pawl carrier, andshiftable means for retainingone end or the other of the pawl carrier,lfor the purpose described.

2. In a `device of the character described,

in 'combination vwith a counter mechanism and'a movable carriagetherefor, a counter 'operating mechanism, a set of value-keys .foractuating the counter mechanism, means for moving. the carriage,shiftable mechanism intermediate saidl keys and the operating mechanismfor transmitting for fard or reverse movement thereto upon thedepression of the value keys, carrying i-ncchanisin `.intermediate thecounters. .and mechanism set by the shiftable mechanism and actuated ,bythe, means formoving the carriageft'or shifting Vthe carrying mechanismfor forward or reverse movement.

3. In an adding machine, a set'of value keys, a counter actuatingmember, graduated operating members forthe keys positioned to engaget-lie actuating mechanism. an additional member common to allthe keysarranged for engagement with each key equally, and a positive stop .forthe counter mechanism' operatively connected `to the additional. member,whereby upon full depression of any value key the counter' will bestopped against movement under` the actuation of anyy other key.

4. In an adding machine, a set of value key levers,` a countermechanism, a master pinion for actuating the counter nua-hanism. meansfor operating the nmsicr pinion. graduating operating membersl for thevalue key levers p with the master pinion operating mechanism. atransverse member' lying across beneath the key levers. and a positivestop for the master pinion fmerativel) counected to the transversemember. whereby upon full -d p'ression ot' any value ke)Y the saidpinion will bc stopped against movement under the actuation of any othervalue key.

5. ln an adding machinea sel ol' val-uev key levers, a counter actuatingmember. graduated operating members l'or the key levers operativelycontactingr with the actuating mechanism, a transverse member lyingracross beneath the key levers. a full stroke pawl for ent'orcingcomplete movement of the transverse member. and a positive stop for thecounter mechanism operatively connected to the.'transverse member,whereby upon t'ull depression of any value key the counter will bestopped against movement under the actuation of any other key.

(5. In an adding machine, a set of value key levers, a counter actuatingmember, gratinated. operating members for the key levers operativelycontacting with the actuating mechanism, an additional member arrangedfor contact with each key lever equally, a full stroke pawl -forenforcing complete movement of the `additional member, hooks forconnecting a depressed key lever with said member and drawing i-t intothe path of the other key levers, and 'a positive stop for the countermechanism operatively connected to the additional member,whereby uponfull depression kof any value key. the counter will be stopped againstmovement under the actuation of any other 7. In an adding machine, a.set of value l-iey levers, a counter mechanism, a master pinion foractuating the counter mechanism,

means for operating the master pinion,

means for graduating the operation of the value key levers with themast-er pinion operating mechanism, an additional member arranged forcontact with each key equally,

a full stroke pawl for enforcing complete movement of the additionalmember, hooks for each key to engage over the said additional memberupon slight depression of the key, and a positive stop for the masterpinion operatively connected to the additional member, whereby upon fulldepression of any value key the said pinion will be stopped againstmovement under the actuation of any other value key.

8. In an adding machine, a movable carriage, ai set of order keys,mechanism for moving the carriage, means for graduating the ope ation ofthe keys, said means oper- Lees \ ri'age, a paper feeding mechanismthereon,

a'l set of orderkeys, mechanism for moving the carriage; contact membersof graduated sizes for the keys positioned to contact with the carriagemoving mechanism, an additional member arranged for 'cont-act with eachkey equally, and a positiif'e stopl for the carriage operativelyconnected to the additional'member, and means operatively connected tothe paper feeding mechanism from said additional member, for the purposedev scribed.

v10. In a device of the character described, in combination with acounter mechanism, and an operatinfr mechanism therefor, a bar, elementson4 eac i end thereof for actuating' the operating mechanism, value keysoperatively connected to said bar between the actuating elements, andselective means for holding fixed either end of said bar, 'for thepurpose described.

'11.l-In a device of the character described,

copies of this patent may be obtained for Ave cerdaL the ends of the barstationary, for thelpurpose described."

' 12. In an addingI machine, a counter element and an operating elementmovable lwith relation to each otlier,`selective means for controllingthe operation of the operating element for addition and subtraction, andmeans for locking said selective means eX- cept When the counter ,andoperating elements are moved out of connection with each other at theend of a transaction.

l3. In an adding machine, a movable carriage with a counter systemthereon, a counter operating element, selective means for controllingthe direction` of actuation of the said element, and means for lockingthe se-k lective means exceptwhen the counter system has been moved ontof operative relan e tion with the counter operating element.

*JOHN HARRISON, JR.

each, by addressing' the' Commissioner o! lhtntl,

